I just replaced my mass air flow sensor due to it being faulty (it would stall sometimes when shifting from drive to reverse) now I have no power after 1/4 throttle. It just seems to fall on its face. Should I disconnect the battery to reset the computer? I am not getting any codes now.

 

I am trying to figure out what would cause the loss of power when I throttle up above 1/2 throttle. My fuel pressure runs between 39 and 40 psi at the rails. And at idle maf is around 45 to 50. I'm really unhappy with the 5.4.

 

I disconnected the battery to reset the computer then I took it for a drive. Still running the same so I just checked my IAT and it says 212 f I also checked for vacuum leaks and didn't find any in the lines. I'm going to clean the maf and see if I have an intake leak. My computer has not shown any misses and I still don't have any codes but it will stall if I rev the engine to 2500 rpm in park. can someone help please. I am moving in a couple of months from New Jersey to Colorado and I will be towing a trailer and this truck must run well I can't afford any breakdowns on the way.

 

Now I have thrown a code. PM 17 and a pending for the other bank. New mass air flow sensor also cleaned it to make sure new air filter and I didn't find any vacuum leaks. Will check again tho. Any suggestions?

 

Sorry code p0174